Identification of pre-stellar cores in high-mass star forming clumps via H2D+ observations with ALMA
نویسندگان
چکیده
منابع مشابه
A necklace of dense cores in the high-mass star forming region G35.20−0.74 N: ALMA observations⋆⋆⋆
Context. The formation process of high-mass stars (with masses >8 M ) is still poorly understood, and represents a challenge from both the theoretical and observational points of view. The advent of the Atacama Large Millimeter Array (ALMA) is expected to provide observational evidence to better constrain the theoretical scenarios. Aims. The present study aims at characterizing the high-mass st...
متن کاملObservations of pre-stellar cores
Our understanding of the physical and chemical structure of pre-stellar cores, the simplest star-forming sites, has significantly improved since the last IAU Symposium on Astrochemistry (South Korea, 1999). Research done over these years has revealed that major molecular species like CO and CS systematically deplete onto dust grains at the interior of pre-stellar cores, while species like N2H +...
متن کاملProbing the initial conditions of high mass star formation I. Deuteration and depletion in high mass pre/protocluster clumps
Aims. UltraCompact Hii regions are signposts of high-mass star formation. Since high-mass star formation occurs in clusters, one expects to find even earlier phases of massive star formation in the vicinity of UltraCompact Hii regions. Here, we study the amount of deuteration and depletion toward pre/protocluster clumps found in a wide-field (10 × 10 arcmin) census of clouds in 32 massive star-...
متن کاملMerging time-scales of stellar sub-clumps in young star-forming regions
Recent observations and hydrodynamical simulations of star formation inside a giant molecular cloud have revealed that, within a star forming region, stars do not form evenly distributed throughout this region, but rather in small sub-clumps. It is generally believed that these subclumps merge and form a young star cluster. The time-scale of this merging process is crucial for the evolution and...
متن کاملLinking pre – and proto – stellar objects in the intermediate - / high - mass star forming region IRAS 05345 + 3157 ⋆ ⋆ ⋆
Context. To better understand the initial conditions of the high-mass star formation process, it is crucial to study at high-angular resolution the morphology, the kinematics, and eventually the interactions of the coldest condensations associated with intermediate/high-mass star forming regions. Aims. The paper studies the cold condensations in the intermediate-/high-mass proto-cluster IRAS 05...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2021
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/202140694